Replacing and washing valve testing device

Abstract

The invention discloses a changing and washing valve testing device, and relates to the technical field of valves, the changing and washing valve testing device comprises a changing and washing valve assembly, the changing and washing valve assembly comprises a valve body and a valve core, the valve body is provided with a plurality of inlets and outlets, and the valve core is provided with a channel; a working medium is stored in the supply box, the outlet of the supply box is communicated with the inlet through a first pipeline, the outlet is communicated with the inlet of the supply box through a second pipeline, and valves are arranged on the first pipeline and the second pipeline; the driving assembly is connected with the changing and washing valve assembly, and the driving assembly enables the valve element to move in the valve body so as to switch the communication state of the changing and washing valve assembly; the detection assembly comprises a first detection piece arranged on the first pipeline and a second detection piece arranged on the second pipeline; the valve element is driven to move through the driving assembly, switching of different changing and washing channels of the changing and washing valve assembly is achieved, the supply box supplies working media to the different changing and washing channels, whether the changing and washing valve assembly is blocked or not is judged according to feedback of the detection assembly, and therefore the blocked area can be treated in time.

Description

Technical Field

[0001] The invention relates to the technical field of valves, and in particular to a testing device for a washing valve. Background Art

[0002] In a hydraulic closed system, the hydraulic oil circulates in a closed loop. To prevent the oil temperature from being too high, some of the hot oil needs to be discharged through the exchange and cleaning valve for cooling and filtering. At this time, it is necessary to detect whether the exchange and cleaning valve is blocked to ensure the stability of the exchange and cleaning valve during operation and the accuracy of the exchange and cleaning flow.

[0003] Therefore, how to detect whether the washing valve is clogged has become a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0004] The object of the present invention is to provide a washing valve testing device to detect whether the washing valve is blocked, thereby ensuring the stability of the washing valve during operation and the accuracy of the washing flow rate.

[0005] To achieve the above object, the present invention provides the following solutions: The present invention provides a washing valve testing device, the washing valve testing device comprising: A wash valve assembly, the wash valve assembly comprising a valve body and a valve core, the valve body being provided with a plurality of inlets and outlets for a working medium to flow through, the valve core being provided with a channel for connecting the inlet with the outlet, the inlet, the outlet and the channel being able to form different wash passages; A supply box, wherein the supply box stores a working medium, wherein the output port of the supply box is connected to the inlet port via a first pipeline, wherein the outlet port is connected to the inlet port of the supply box via a second pipeline, wherein the first pipeline matches the washing passage, and valves are provided on the first pipeline and the second pipeline; A drive assembly, the drive assembly is connected to the wash valve assembly, the drive assembly applies a first force to the valve core, the first force causes the valve core to move in the valve body to achieve communication between different inlets and different outlets, so as to switch the communication state of the wash valve assembly; The detection component includes a first detection component arranged on the first pipeline, and a second detection component arranged on the second pipeline, the first detection component is used to detect the physical and chemical properties of the working medium before entering the changing and washing passage, and the second detection component is used to detect the physical and chemical properties of the working medium discharged from the changing and washing passage.

[0006] Preferably, the first pipeline includes a first branch and a second branch arranged in parallel, the first branch is provided with a first delivery pump, the second branch is provided with a second delivery pump, and the first delivery pump and the second delivery pump are connected in series.

[0007] Preferably, the washing valve testing device comprises a driving device, an output end of the driving device is connected to the first delivery pump, and the output end of the driving device is connected to a torque sensor.

[0008] Preferably, the driving assembly comprises a third pipeline, both ends of which are respectively connected to the supply box and the inlet, and a third delivery pump is provided on the third pipeline; Preferably, a reversing valve is provided between the first pipeline and the inlet, and the reversing valve matches the first pipeline and the inlet.

[0009] Preferably, the driving component includes an electromagnetic reversing component, the electromagnetic reversing component includes an electromagnetic part and a magnetic attraction part, the magnetic attraction part is arranged on the valve core, the electromagnetic part can apply a second force to the valve core, and the second force causes the valve core to move in the valve body.

[0010] Preferably, the first detection member and the second detection member both include a pressure sensor; and / or a flow sensor; and / or a turbidity sensor; and / or the detection component includes a position sensor provided on the valve core.

[0011] Preferably, an overflow valve is provided on the first pipeline; and / or, a delivery pump is provided on the first pipeline; and / or, a filter is provided on the first pipeline; and / or, a level meter is provided in the supply box.

[0012] Preferably, the wash valve assembly includes a wash valve, which is connected in sequence to a buffer throttling baffle and a wash overflow valve, and a damper is provided between the buffer throttling baffle and the wash overflow valve, and the damper is respectively connected in parallel with the buffer throttling baffle and the wash overflow valve.

[0013] Compared with the prior art, the present invention has achieved the following technical effects: During the test, the driving component applies a first force to the valve core of the wash valve assembly, drives the valve core to move in the valve body, changes the connection state of the wash valve assembly, connects the first inlet of the wash valve assembly with the first outlet, and switches the wash valve assembly to the first connection state. At this time, the valves on the corresponding first pipeline and the second pipeline are opened, so that the working medium in the supply box can enter the wash valve assembly through the corresponding first pipeline, and the physical and chemical properties of the working medium before and after entering the wash valve assembly are respectively observed through the first detection member and the second detection member on the corresponding first pipeline and the second pipeline. According to the changes in the physical and chemical properties before and after entering the wash valve assembly, the blockage state of the first wash passage formed by the first inlet, the channel and the first outlet of the wash valve assembly is determined; Subsequently, the valves on the first pipeline and the second pipeline that were previously opened are closed, and the driving component continues to move the valve core, so that the first inlet of the wash valve assembly is connected to the other outlets, or the other inlets of the wash valve assembly are connected to the first outlet, or the other inlets of the wash valve assembly are connected to the other outlets, the wash valve assembly is switched from the first connection state to the second connection state, and the corresponding valves on the first pipeline and the second pipeline are opened, so that the working medium can flow from the supply box through the corresponding first pipeline into the wash valve assembly, and according to the corresponding first detection member and the second detection member, the changes in the physical and chemical properties of the working medium before and after entering the wash valve assembly are obtained, and the wash valve is judged. The blockage state of the second wash passage formed by the inlet, channel and outlet of the component in the second connected state; thereby closing the open valve again, driving the valve core to continue to move, and switching the wash valve assembly from the second connected state to the third connected state... In the nth connected state, open the corresponding valves on the first pipeline and the second pipeline, and determine the blockage state of the second wash passage of the wash valve assembly according to the corresponding first detection member and the second detection member... Then implement the test of all wash passages in the valve core assembly, so as to handle the wash passages with blockage accordingly, so as to avoid as much as possible the use of a blocked wash valve in the hydraulic system, resulting in unstable wash flow of the wash valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a structural schematic diagram of the washing valve testing device; Among them, 1. driving device; 2. torque meter; 3. third delivery pump; 4. third overflow valve; 5. third pressure gauge; 6. third flow meter; 7. two-position four-way reversing valve; 8. first delivery pump; 9. first overflow valve; 10. first pressure gauge; 11. first flow meter; 12. changing and washing valve; 13. buffer throttling baffle; 14. changing and washing overflow valve; 15. damping; 16. second pressure gauge; 17. first filter; 18. supply box; 19. level gauge; 20. valve; 21. second filter. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] like Figure 1 As shown, the present invention discloses a washing valve testing device, which includes: a washing valve assembly, the washing valve assembly includes a valve body and a valve core, the valve body is provided with a plurality of inlets and outlets for the working medium to flow through, the valve core is provided with a channel for connecting the inlet with the outlet, the inlet, the outlet and the channel can form different washing passages; a supply box 18, the supply box 18 stores the working medium, the output port of the supply box 18 is connected to the inlet through a first pipeline, the outlet is connected to the inlet of the supply box 18 through a second pipeline, the first pipeline matches the washing passage, and the first Valves are provided on both the pipeline and the second pipeline; a driving component, the driving component is connected to the exchange and washing valve component, the driving component applies a first force to the valve core, the first force causes the valve core to move in the valve body to achieve connectivity between different inlets and different outlets, so as to switch the connectivity state of the exchange and washing valve assembly; a detection component, the detection component includes a first detection component provided on the first pipeline, and a second detection component provided on the second pipeline, the first detection component is used to detect the physical and chemical properties of the working medium before it enters the exchange and washing passage, and the second detection component is used to detect the physical and chemical properties of the working medium discharged from the exchange and washing passage.

[0019] During the test, the driving component applies a first force to the valve core of the exchange valve assembly, driving the valve core to move in the valve body, changing the connection state of the exchange valve assembly. If the exchange valve assembly is in a normally-off state, the first inlet of the exchange valve assembly is connected to the first outlet, so that the exchange valve assembly is switched from the disconnected state to the first connected state. If the exchange valve assembly is in a normally-on state, the driving component may not be started first. At this time, the valves on the corresponding first pipeline and the second pipeline are opened (the valve on the corresponding first pipeline refers to the first pipeline connected to the first inlet, and the valve on the corresponding second pipeline refers to the second pipeline connected to the first outlet), so that the supply The working medium in the feeding box 18 can enter the exchange and wash valve assembly through the corresponding first pipeline, and the physical and chemical properties of the working medium before and after entering the exchange and wash valve assembly are observed respectively through the first detection member and the second detection member on the corresponding first pipeline and the second pipeline. According to the changes in the physical and chemical properties before and after entering the exchange and wash valve assembly, the blockage state of the first exchange and wash passage formed by the first inlet, the channel and the first outlet of the exchange and wash valve assembly is determined; then, the valves on the first pipeline and the second pipeline that were opened before are closed, and the above steps are repeated until all the exchange and wash passages of the exchange and wash valve assembly are detected: the driving component continues to move the valve core so that the exchange and wash valve assembly The first inlet is connected with the other outlets, or the other inlets of the exchange and wash valve assembly are connected with the first outlet, or the other inlets of the exchange and wash valve assembly are connected with the other outlets, the exchange and wash valve assembly is switched from the first connected state to the second connected state, and the valves on the corresponding first pipeline and the second pipeline are opened, so that the working medium can flow from the supply box 18 through the corresponding first pipeline into the exchange and wash valve assembly, and according to the corresponding first detection member and the second detection member, the changes in the physical and chemical properties of the working medium before and after entering the exchange and wash valve assembly are obtained, and the inlet, channel and outlet of the exchange and wash valve assembly in the second connected state are determined. The second washing passage is blocked; thereby the opened valve is closed again, and the valve core is driven to continue to move, switching the washing valve assembly from the second connected state to the third connected state... In the nth connected state, the corresponding valves on the first pipeline and the second pipeline are opened, and the blockage state of the second washing passage of the washing valve assembly is determined according to the corresponding first detection member and the second detection member... Then, all washing passages in the valve core assembly are tested, so as to perform corresponding processing on the washing passages with blockage, so as to avoid as much as possible the use of a blocked washing valve 12 in the hydraulic system, resulting in unstable washing flow of the washing valve 12.

[0020] It should be noted that the outlets mentioned in this article are all outlets set on the valve body, and the outlets do not represent the output ports on the supply box 18. According to the different types of the tested exchange valve assemblies, the valve body of the exchange valve assembly has different numbers of inlets and outlets. The inlets, outlets and channels can form different exchange passages, which means that by driving the valve core in the valve body through the drive assembly, the communication between different inlets and different outlets can be achieved through the channels, thereby forming different exchange passages; Figure 1 As shown, the wash valve 12 in the wash valve assembly is a three-position three-way valve, which has two inlets and one outlet, so the three-position three-way valve can form two different wash passages. When the wash valve assembly test device in the present invention is used to detect the wash valve assembly in the hydraulic system, the working medium stored in the supply box 18 can be hydraulic oil, and the specific type of hydraulic oil is not detailed here. The connection state switching of the channel wash valve assembly includes the transition between the disconnected state and the connected state, and the switching between different wash passages.

[0021] The physical and chemical properties include the temperature, turbidity, pressure of the working medium, the flow rate flowing into the wash valve assembly, and the flow rate flowing out of the wash valve assembly, which can reflect whether the wash valve assembly is blocked through the parameters of the first detection member and the second detection member. Depending on the content of the physical and chemical properties, the first detection member and the second detection member both include a pressure sensor; and / or a flow sensor; and / or a turbidity sensor; and / or the detection assembly includes a position sensor disposed on the valve core, and the position sensor is disposed on the valve core to determine whether the valve core moves in the valve body based on the feedback of the position sensor.

[0022] Among them, the present invention can set a corresponding number of first pipelines and second pipelines according to the number of inlets and outlets set on the valve body (it can set a sufficient number of first pipelines and second pipelines, or the first pipeline and the second pipeline can include a sufficient number of branches), and set valves on the first pipeline and the second pipeline to open and close the corresponding valves when the washing valve assembly switches different reversing paths. Alternatively, the present application can also set a reversing valve between the first pipeline and the washing valve assembly, and realize the switching of the same first pipeline and different inlets through the reversing of the reversing valve, thereby simplifying the structure of the test device in the present invention and reducing the test cost. Different types of reversing valves can be used according to the type of reversing valve and working conditions. Figure 1 As shown, when the wash valve 12 in the wash valve assembly is a three-position three-way valve, the reversing valve can adopt a two-position four-way valve, specifically a two-position four-way solenoid valve, and at this time, one end of the first pipeline is connected to the supply box 18, and the other end is connected to the T port of the two-position four-way valve, the B port of the two-position four-way valve is connected to the X port of the three-position three-way valve, and the A port of the two-position four-way valve is connected to the Y port of the three-position three-way valve. At this time, when the two-position four-way solenoid valve is not energized, the working medium is discharged through the first pipeline, the T port of the two-position four-way valve, and the A port of the two-position four-way valve, and enters the Y port of the three-position three-way valve, and then is discharged from the outlet of the three-position three-way valve. When the two-position four-way solenoid valve is energized, the working medium is discharged through the first pipeline, the T port of the two-position four-way valve, and the B port of the two-position four-way valve, enters the X port of the three-position three-way valve, and then is discharged from the outlet of the three-position three-way valve.

[0023] It should be noted that the P port and T port of the two-position four-way reversing valve 7 are both the inlets of the two-position four-way reversing valve 7, the A port and B port of the two-position four-way reversing valve 7 are both the outlets of the two-position four-way reversing valve 7; the X port and Y port of the washing valve 12 are both the inlets of the washing valve 12.

[0024] like Figure 1 As shown, when the wash valve 12 of the wash valve assembly is a three-position three-way valve with two inlets, a first branch and a second branch respectively connected to the two inlets can be set, and the first branch and the second branch are set in parallel. The first ends of the first branch and the second branch are respectively connected to the two inlets, and the second ends of the first branch and the second branch are both connected to the outlet of the supply box 18. A first delivery pump 8 is provided on the first branch, and a second delivery pump is provided on the second branch. The first delivery pump 8 is connected in series with the second delivery pump, and the first delivery pump 8 can be connected to the second delivery pump through structures such as a transmission shaft, a bushing, and a transition plate. In this way, the first delivery pump 8 and the second delivery pump are integrated, which reduces the volume of the wash valve assembly test device and reduces the space occupied.

[0025] Furthermore, the first delivery pump 8 and the second delivery pump can be driven to rotate by the driving device 1, the output end of the driving device 1 is connected to the first delivery pump 8, and the output end of the driving device 1 is connected to a torque sensor; through the torque sensor, the torque of the driving device 1 is detected in real time to avoid damage to the driving device 1 due to excessive torque.

[0026] Furthermore, according to the different ways of driving the valve core movement of the wash valve 12 in the wash valve assembly, the drive assembly has various settings. For example, the drive assembly includes a third pipeline, the two ends of the third pipeline are respectively connected to the supply box 18 and the inlet, and the third pipeline is provided with a third delivery pump 3; in this case, the third delivery pump 3, the supply box 18 and the working medium together constitute the drive assembly, and the third delivery pump 3 extracts the working medium from the supply box 18 and inputs it into the valve body, pushing the valve core to move in the valve body, thereby realizing the switching of different connection states of the wash valve assembly.

[0027] Alternatively, the driving component may not adopt the above-mentioned form. The driving component includes an electromagnetic reversing component, which includes an electromagnetic part and a magnetic attraction part. The magnetic attraction part is arranged on the valve core. The electromagnetic part can apply a second force to the valve core. The second force causes the valve core to move in the valve body, thereby realizing the switching of different connection states of the replacement valve assembly.

[0028] In addition, the power for the working medium to move from the supply box 18 to the washing passage or to the inside of the valve body can be provided by arranging a delivery pump, such as a plunger pump, on the corresponding pipeline, and overflow valves can also be arranged on the first pipeline and the second pipeline to ensure that the delivery pressure of the pipeline is within the threshold range. In addition, in order to reduce the impact of impurities in the working medium on the judgment of the blockage state of the washing passage of the washing valve 12 in the washing valve assembly, the present invention provides filters on the first pipeline and the second pipeline, and the impurities in the working medium are intercepted by the filters to ensure the accuracy of the judgment of the blockage state of the washing valve 12. A level meter, such as a liquid level meter 19, can also be arranged in the supply box 18. According to the indication of the liquid level meter 19, the working medium can be replenished in time to ensure the continuity of the operation of the testing device.

[0029] like Figure 1 As shown, when the washing valve 12 of the tested washing valve assembly is a three-position three-way valve, a two-position four-way valve is provided between the first pipeline and the washing valve 12, the driving assembly includes a third pipeline, the two ends of the third pipeline are respectively connected to the supply box 18 and the inlet, and the third pipeline is provided with a third delivery pump 3; the supply box 18 is sequentially connected with a valve 20 (specifically, it can be a butterfly valve or other valve that can control the on-off of the pipeline), a second filter 21, the first pipeline and the third pipeline are connected in parallel, the first pipeline is sequentially provided with a first delivery pump 8, a first overflow valve 9, a first pressure gauge 10 and a first flowmeter 11, and the third pipeline is sequentially provided with a third delivery pump 3, a third overflow valve 9, a first pressure gauge 10 and a first flowmeter 11. Valve 4, the third pressure gauge 5 and the third flow meter 6, one end of the first pipeline and the third pipeline are respectively connected to the supply box 18 through a low-pressure hose, the other end of the first pipeline is connected to the T port of the two-position four-way valve through a high-pressure hose, the other end of the third pipeline is connected to the P port of the two-position four-way valve through a high-pressure hose, the A port of the two-position four-way valve is connected to the Y port of the three-position three-way valve through a high-pressure hose, the B port of the two-position four-way valve is connected to the X port of the three-position three-way valve through a high-pressure hose, the outlet of the three-position three-way valve is connected to the second pressure gauge 16 and the first filter 17 in sequence, and the outlet of the three-position three-way valve is connected to the supply box 18 through the first pipeline and the high-pressure hose.

[0030] Based on the above content, the working process of the cleaning valve assembly test device is as follows: When testing the blockage state of the washing passage between the Y port and the outlet of the washing valve, set the set overflow pressure of the third overflow valve 4 (specifically 4Mpa), the two-position four-way electromagnetic reversing valve is not energized, start the driving device 1, and the driving device 1 drives the first delivery pump 8 and the third delivery pump 3 to work through the torque meter 2, with a speed of 1500rpm and a load of 10Mpa. Slowly adjust the set pressure of the first overflow valve 9, observe the pressure difference between the first pressure gauge 10 and the second pressure gauge 16, and the pressure difference is 2Mpa (when the pressure difference is 2Mpa, it means that the opening pressure of the washing valve 12 is reached), 2.5Mpa, and record the corresponding flow rates. Similarly, when testing the blockage state of the washing passage between the washing valve 12X port and the outlet, set the set overflow pressure of the third overflow valve 4 (specifically 4Mpa), energize the two-position four-way electromagnetic reversing valve, turn on the drive device 1, and drive the first delivery pump 8 and the third delivery pump 3 through the torque meter 2, with a speed of 1500rpm and a load of 10Mpa. Slowly adjust the pressure setting of the first overflow valve 9, observe the pressure difference between the first pressure gauge 10 and the second pressure gauge 16, and record the corresponding flow rates when the pressure difference is 2Mpa and 2.5Mpa.

[0031] Here’s how it works: When testing the wash valve 12: open the valve 20 between the supply box 18 and the first pipeline, the drive device 1 is activated, and the drive device 1 drives the first delivery pump 8 and the third delivery pump 3 to rotate through the torque meter 2. The first delivery pump 8 and the third delivery pump 3 absorb oil from the supply box 18 through the valve 20 and the low-pressure hose between the supply box 18 and the first pipeline and the third pipeline. The hydraulic oil passes through the first filter 17 and enters the first delivery pump 8 and the third delivery pump 3 respectively.

[0032] The oil discharged from the oil outlet of the third delivery pump 3 passes through the third overflow valve 4, the third pressure gauge 5, the third flowmeter 6, and enters the P port of the two-position four-way reversing valve 7. When the two-position four-way solenoid valve is not energized, the oil is discharged from the B port and enters the X port of the exchange valve 12, which is responsible for pushing the valve core open, so that the Y port of the exchange valve 12 is opened. When the two-position four-way solenoid valve is energized, the oil is discharged from the A port and enters the Y port of the exchange valve 12, which is responsible for pushing the valve core open, so that the X port of the exchange valve 12 is opened.

[0033] The oil discharged from the oil outlet of the first delivery pump 8 passes through the first overflow valve 9, the first pressure gauge 10, and the first flow meter 11, and enters the T port of the two-position four-way reversing valve 7. When the two-position four-way solenoid valve is not energized, it is discharged from the A port and enters the Y port of the washing valve 12. When the two-position four-way solenoid valve is energized, it is discharged from the B port and enters the X port of the washing valve 12.

[0034] like Figure 1As shown, the wash valve assembly in the present invention includes a wash valve 12, which is connected to a buffer throttle baffle 13 and a wash overflow valve 14 in sequence, and a damper 15 is provided between the buffer throttle baffle 13 and the wash overflow valve 14, and the damper 15 is respectively connected in parallel with the buffer throttle baffle 13 and the wash overflow valve 14. The larger the opening of the buffer throttle baffle 13, the larger the wash flow rate, the wash overflow valve 14 determines the opening pressure of the wash valve 12, and the damper 15 plays a throttling role; the above structure of the wash valve assembly is equivalent to forming an actual wash valve, and the wash valve assembly can be used in a closed or open hydraulic system.

[0035] The present invention records multiple technical solutions, but there is no situation where contrary technical inspiration is given.

[0036] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A washing valve testing device, characterized in that: The washing valve testing device comprises: A wash valve assembly, the wash valve assembly comprising a valve body and a valve core, the valve body being provided with a plurality of inlets and outlets for a working medium to flow through, the valve core being located in the valve body, the valve core being provided with a channel for connecting the inlet with the outlet, the inlet, the outlet and the channel being able to form different wash passages; A supply box, wherein the supply box stores a working medium, wherein the output port of the supply box is connected to the inlet port via a first pipeline, wherein the outlet port is connected to the inlet port of the supply box via a second pipeline, wherein the first pipeline matches the washing passage, and valves are provided on the first pipeline and the second pipeline; A drive assembly, the drive assembly is connected to the wash valve assembly, the drive assembly applies a first force to the valve core, the first force causes the valve core to move in the valve body to achieve communication between different inlets and different outlets, so as to switch the communication state of the wash valve assembly; The detection component includes a first detection component arranged on the first pipeline, and a second detection component arranged on the second pipeline, the first detection component is used to detect the physical and chemical properties of the working medium before entering the changing and washing passage, and the second detection component is used to detect the physical and chemical properties of the working medium discharged from the changing and washing passage.

2. The washing valve testing device according to claim 1, characterized in that: The first pipeline includes a first branch and a second branch arranged in parallel, the first branch is provided with a first delivery pump, the second branch is provided with a second delivery pump, and the first delivery pump and the second delivery pump are connected in series.

3. The washing valve testing device according to claim 2, characterized in that: The washing valve testing device comprises a driving device, an output end of the driving device is connected to the first delivery pump, and a torque sensor is connected to the output end of the driving device.

4. The washing valve testing device according to claim 1, characterized in that: The driving assembly comprises a third pipeline, both ends of which are respectively connected to the supply box and the inlet, and a third delivery pump is arranged on the third pipeline.

5. The washing valve testing device according to claim 1 or 4, characterized in that: A reversing valve is provided between the first pipeline and the inlet, and the reversing valve matches the first pipeline and the inlet.

6. The washing valve testing device according to claim 1, characterized in that: The driving assembly includes an electromagnetic reversing assembly, which includes an electromagnetic part and a magnetic attraction part. The magnetic attraction part is arranged on the valve core. The electromagnetic part can apply a second force to the magnetic attraction part, and the second force causes the valve core to move in the valve body.

7. The washing valve testing device according to claim 1, characterized in that: The first detection member and the second detection member both include a pressure sensor; and / or a flow sensor; and / or a turbidity sensor; and / or the detection component includes a position sensor disposed on the valve core.

8. The washing valve testing device according to claim 1, characterized in that: An overflow valve is provided on the first pipeline; and / or a delivery pump is provided on the first pipeline; and / or a filter is provided on the first pipeline; and / or a level meter is provided in the supply box.

9. The washing valve testing device according to claim 1, characterized in that: The wash valve assembly includes a wash valve, which is connected with a buffer throttling baffle and a wash overflow valve in sequence, and a damper is provided between the buffer throttling baffle and the wash overflow valve, and the damper is respectively connected in parallel with the buffer throttling baffle and the wash overflow valve.

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